Process of thickening drying-oils



UNITED STATES PATENT OFFICE.

WILLIAM N. BLAKEMAN, JR, or MOUNT VERNON, NEW YORK.

PROCESS OF THICKENING DRYING-OILS.

SPECIFICATION forming part of Letters Patent No. 496,988, dated May 9,1893. Application filed December 2,1892. Serial No. 453.885. (Nospecimens.)

To all whom it may concern.-

Be it known that I, {VILLIAM N. BLAKEMAN, J12, of Mount Vernon, in thecounty of West chester and State of New York, have invented a new anduseful Process of Thickening Drying-Oils while Preserving their Colorand Drying Qualities Unimpaired, which invention is fully set forth inthe following specification.

The object of this invention is sufficiently indicated by its title.

The invention will first be described in detail and then set forth inthe claims. I

In carrying out this process, I first select a metallic soap, preferablya metallic soap capable of absorbing carbonic acid, such asalumina-soap, which by the aid of heat, I dissolve in an animal orvegetable oil not degenerated by the heat employed. 0f the vegetableoils sunflower seed oil may be employed, but I prefer to use cotton seedoil. Into the oil I put about twenty to thirty per cent. of the metallicsoap, or a quantity sufficient to bring the mixture to about theconsistency of jelly. The soap may be mixed to saturation, but thepercentage above named is preferable in practice. This thickened oil Ithen mix with the drying oil, either by agitation alone or by theassistance of a water-bath of moderate temperature. A proportion of fromfive to seven per cent. of thickened oil to the drying oil will givegood results, but more or less than said proportions may be employed.When cold, this mixture will be found of greater adaptability forholding or carrying pigments than the oil' before treatment. The colorof the oil also will remain unimpaired and its drying qualities will bepreserved or improved by said treatment. First, for the reason that thehigh heat necessary for completely dissolving the metallic soap havingan affinity for carbonic acid does not degrade the character or color ofthe cottonseed-oil, but

. rather tends to bleach it; and second, because the use'of the metallicsoap having an affinity for carbonic acid assists and quickens thesiccative action of the already drying character of the oil.

I do not claim merely the mixing of a metallic soap with a drying oilfor thickening or pigment-carrying purposes as such mixtures have beentried, though With only partial success, the objectionto their extendeduse being that the heat employed, necessary to effect the mixture, givessuch a dark color to the oils that they do not afterward bleach and thusthe utility of the mixture is restricted in a very great degree. I haveovercome this difficulty by my process, by first mixing the metallicsoap with an oil not degraded by the heat .employed and thenincorporating this mixture, which has made this oil alkaline or basic,with the drying oil. I thus preserve the color of the drying-oilunimpaired, and if the soap employed be a metallic soap capable ofabsorbing carbonic acid the drying qualities of'tbe drying-oil will beimproved, in addition to the increase in its pigment-carryingcapacity,as before described. The dryingoil, thus treated as above, say linseedoil or other oil technically known as a drying-oil, may be stored forfuture use or be used at once for mixture With any suitable pigment orpigments for the making of paints. Any ordinary commercial drier may beadded to such paints where desired.

Having thus fully described my invention, I claim- 1. The processhereinbefore described of treating drying-oils, which consists incombining, with a drying oil, a mixture composed of metallic soap mixed,by the agency of heat, with an oil not degenerated by the heat required,to effect the mixture, whereby the drying oil is rendered thicker andits color preserved, substantially as and for the purposes set forth.

2. The process of treating drying oils for the purpose of thickening thesame and preserving their color, consisting in first making a compoundof metallic soap mixed, by the agency of heat, with an oil notdegenerated by the heat required to effect the mixture, and then addingthis mixture to the drying oil selected, with the further application ofheat, substantially as set forth.

3. The process of treating drying oils consisting in first making amixture of cottonseed-oil and a metallic soap, by the agency of heatapplied thereto, and then adding this mixture to the drying-oilselected, with or without the further application of heat, substantiallyas and for the purposes set forth.

I WM. N. BLAKEMAN, JR.

Witnesses:

FRANCIS P. REILLY, JA ES F. COURT.

